95'RS-T
10+ Year Contributor
- 440
- 1
- Mar 10, 2009
-
Germansville,
Pennsylvania
ok found a good price on a 255lph hp pump from extreme psi all i need now is the 12:1 fmu I was wondering what the difference is between the Fmu and AFPR but at the same time i believe I'm answering my own question by saying the AFPR is constant pressure even at idle, thus creating too much fuel correct? I know the fmu uses vac/boost so it then raises and lowers the pressure when off and on the throttle right?